Home / 13,213.20-19,811.70-7,663.80

Finding the Fourth Proportional to 13,213.20, 19,811.70 and 7,663.80

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Solution

The fourth proportional to 13,213.20, 19,811.70 and 7,663.80 is: 11,491.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.20 : 19,811.70 = 7,663.80 : x
  2. Step 2: Convert to fraction form
    13,213.20/19,811.70 = 7,663.80/x
  3. Step 3: Cross multiply
    13,213.20x = 19,811.70 × 7,663.80
  4. Step 4: Simplify right side
    13,213.20x = 151,832,906.46
  5. Step 5: Solve for x
    x = 151,832,906.46/13,213.20
  6. Step 6: Final answer
    x = 11,491.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.